Civil Service Numerical Reasoning Test Time, Speed and Logical Numerical Reasoning 2

Question 1

A project takes 3 workers 20 days to complete. How long would it take 4 workers (at the same rate)?

Accepted Answer

15 days

Answer

Total work = 3 × 20 = 60 worker-days. Time for 4 workers = 60 ÷ 4 = 15 days.

Question 2

A train journey is 180 miles. The train travels the first 60 miles at 60 mph, then the remaining 120 miles at 80 mph. What is the total journey time?

Accepted Answer

2 hours 30 minutes

Answer

First section: 60 ÷ 60 = 1 hour. Second section: 120 ÷ 80 = 1.5 hours. Total = 2.5 hours = 2 hours 30 minutes.

Question 3

A clock shows 3:45 PM. What time will it show 4 hours and 50 minutes later?

Accepted Answer

8:35 PM

Answer

3:45 + 4 hours = 7:45. 7:45 + 50 minutes = 8:35 PM.

Question 4

A car travels 420 km in 3.5 hours. What is its average speed?

Accepted Answer

120 km/h

Answer

Speed = 420 ÷ 3.5 = 120 km/h.

Question 5

A machine produces 150 units per hour. How long will it take to produce 900 units?

Accepted Answer

6 hours

Answer

Time = 900 ÷ 150 = 6 hours.

Civil Service Numerical Reasoning Practice Test